Want to Start Sending 8x10s TTM

Hey guys I am looking to start sending 8x10s TTM to mostly football HOFers. What I am mainly wondering is how to find out players addresses and which players are known for signing. Does anybody with TTM experience have any tips to sending things out?
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As the list of HOFers is so long, and many do sign for free or charge a low fee, I would suggest joining one of the autograph websites. I imagine for a one month subscription fee you can find all the answers you are looking for much better then anyone can provide it here.
Clear Skies,
Mark
Raw: Tony Gonzalez (low #'d cards, and especially 1/1's) and Steve Young.